CN217639584U - Presence detection device - Google Patents

Abstract

The utility model provides a presence detection device, wherein presence detection device includes an infrared sensor and a microwave sensor, presence detection device with infrared sensor is right human in the target detection region is in the feedback of the cross-regional action of the tangential direction of the detection direction of presence detection device acquires the detection result that whether human exists, and with microwave sensor based on the Doppler effect principle with Doppler intermediate frequency signal is to the high accuracy feedback of the activity existence characteristic corresponding with human removal action, and/or with wave signal is to the detection result that whether human exists is acquired to the feedback of the action of specific frequency range, with the compensation infrared sensor is right the low responsivity defect of the activity existence characteristic of the radial direction's of the detection direction of presence detection device, or further compensation infrared sensor is to the low responsivity defect of the micro-action of the type of action including human static limbs action and/or breathing and/or heartbeat.

Description

Presence detection device

Technical Field

The utility model relates to a there is the detection field, especially relates to a presence detection device.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, smart home and intelligent security technology on environment detection, particularly on the detection accuracy of the existence or non-existence of a human body and the behavior state of the human body in the existing state are higher and higher, and only if a detection result which is accurate enough is obtained, an accurate judgment basis can be provided for the intelligent terminal device. The existing technologies for detecting and sensing human bodies mainly comprise: 1. the human body and the human body behavior state are identified by corresponding algorithms based on image acquisition, but the human body behavior state is difficult to accept due to the risk of invading and leaking privacy, and the defects of complex algorithm and high requirement on hardware performance exist at the same time, so that the cost is high. 2. The method comprises the steps that a Fresnel lens is used for partitioning a corresponding detection area to detect the trans-regional action of a human body in the detection area through an infrared pyroelectric sensor (PIR), but the method is limited in that the partition precision of the Fresnel lens on the detection area cannot detect human body activity corresponding to human body respiration or heartbeat action and is prone to generate misjudgment on the existence of the human body, and if the human body exists in the detection area in a static state, the situation that the human body does not exist in the detection area is judged, and abnormal work of corresponding electrical equipment controlled based on the detection result of the existence of the human body is caused. 3. The microwave detection technology based on the doppler effect principle specifically includes transmitting a microwave beam and receiving a reflected echo formed by the microwave beam reflected by a corresponding object, and generating a doppler intermediate frequency signal corresponding to a frequency difference between the microwave beam and the reflected echo in a mixing detection manner, wherein the doppler intermediate frequency signal is feedback to the motion of the corresponding object. The microwave detection technology based on the Doppler effect principle is used as a person and an object, and an important junction connected between the object and the object has unique advantages in behavior detection and existence detection technology, can detect moving objects such as action characteristics, movement characteristics and micro-movement characteristics of the person and even heartbeat and respiration characteristic information of the person under the condition of not invading the privacy of the person, and has wide application prospect.

However, in order to obtain a sufficiently accurate detection result in a commonly used wide-angle detection area, particularly based on a detection result of the presence or absence of heartbeat and/or breathing movements of a human body, so as to obtain a sufficiently accurate detection result in a static behavior state of the human body, such as a behavior state of sitting still or sleeping on the stomach, the existing microwave detection device based on the doppler effect principle has a requirement on the duration of the transmission of microwaves, such as a requirement on the second level or a requirement on a duty ratio of more than 10%, corresponding to a requirement on the second level, which causes the existing microwave detection device to operate in a mode of continuously transmitting microwaves more than once, or in a mode of intermittently transmitting microwaves with a pulse operation time of the second level or a duty ratio of more than 10%, corresponding to an operation current of the microwave detection device of 10 to 50mA which cannot be adapted to the power supply of a battery, particularly, the microwave detection device is powered by a battery with a capacity of 2000mAh for 25mA, the microwave detection device needs to be charged or replaced by a battery, and is designed to be connected to a power grid with a frequency too frequently.

Microwave detection device adopts wired network deployment's mode wiring complicated, has higher installation cost on the one hand, if the line cost of wire rod, wire rod walk the line cost, especially the hidden line cost of wire rod to in the reality be far higher than microwave detection device's own cost, on the other hand, complicated wiring is unfavorable for the maintenance and repair and causes the increase by a wide margin of maintenance and repair cost, promptly microwave detection device's popularization is mainly restricted to microwave detection device's installation and maintenance and repair cost. Therefore, it is advantageous to simplify the installation and maintenance of the microwave detection device and reduce the cost of the installation and maintenance of the microwave detection device by means of the battery power supply, thereby facilitating the popularization of the microwave detection device, and as mentioned above, in order to obtain a sufficiently stable detection result, the power consumption of the existing microwave detection device is difficult to reduce, as disclosed in the chinese patent application publication No. CN111867025A, a low power consumption microwave sensor and a control circuit thereof are disclosed, which are used to provide periodic pulse operation to a low noise amplifier, a mixer, a radio frequency oscillator, a power amplifier and a low frequency filter amplifier respectively through a power management module, and have a pulse operation time TON of several microseconds, a pulse operation gap TOFF of several milliseconds, and a duty ratio of far less than 1% and are only suitable for the mobile detection of a human body, i.e., the wireless networking of the microwave detection device is realized by means of the battery power supply, but the existing microwave detection device is difficult to consider both the stability and the low power consumption of the detection result frequently, and it is impractical to change the battery of the microwave detection device in the battery power supply state.

In addition, an infrared microwave dual technology detector is disclosed in the chinese utility model publication with the authorization notice number CN204632030U, which combines the infrared detection and the microwave detection, only when the infrared detection circuit senses a signal, the microwave emission and detection function is started to achieve the purpose of saving power, and the infrared and the microwave detect signals simultaneously, and then alarm, that is, it limits the application scenario to an environment of "in most cases, there is no human existing in the detection area" based on the alarm application, that is, for the environments where the human body stays for a long time or the human body moves frequently, such as bedrooms, offices, public places, etc., it is based on that "only when the infrared detection circuit senses a signal, the microwave emission and detection function is started again" scheme can cause the microwave emission to be started frequently and the purpose of saving power cannot be achieved, and the scheme based on "infrared and microwave detect signals simultaneously and alarm" cannot adapt to the scenario where the human body exists in a static state or an intermittent static state.

In addition, the penetration characteristic of the microwave is used as a unique advantage of microwave detection, and adverse effects may also be generated in a corresponding usage scenario, specifically, in a doppler intermediate frequency signal obtained based on the doppler effect principle, where the amplitude of the doppler intermediate frequency signal is directly related to the motion amplitude of a human body under the same distance limitation, where since the motion of the human body has a larger amplitude span and the amplitude of the corresponding doppler intermediate frequency signal has a larger amplitude span, a detection range of the motion of the human body cannot be accurately defined according to a corresponding threshold setting of the amplitude of the doppler intermediate frequency signal, that is, effective coverage of a target detection area is satisfied, a transmitted microwave beam has a coverage area beyond the target detection area based on the penetration characteristic and the reflection characteristic of the microwave, and human body motion interference of a non-target detection area cannot be eliminated based on the corresponding threshold setting of the amplitude of the doppler intermediate frequency signal, so as to affect accuracy of detection on whether a human body exists in the target detection area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a presence detection device, wherein presence detection device includes an infrared sensor and a fresnel lens, wherein fresnel lens set up in infrared sensor's detection direction's route, in order to realize the tangential direction of presence detection device's detection direction is to the subregion of target detection region, wherein infrared sensor is right human in the target detection region is in the feedback that the cross-region of the tangential direction of presence detection device's detection direction removed detects human existence.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device is based on the fresnel lens is right to detect regional subregion, infrared sensor can be avoided receiving by accurate control to the detection scope that human body exists the interference of the action outside the detection region improves the stability of presence detecting device, guarantee the accuracy of the detection result of presence detecting device.

Another object of the utility model is to provide a there is detecting device, wherein there is detecting device including a microwave sensor, wherein microwave sensor uses a doppler intermediate frequency signal to the high accuracy feedback that has the characteristic to the activity corresponding with the human motion based on the doppler effect principle, in order to compensate infrared sensor is right there is the low responsibility defect of characteristic in the activity of detecting device's detection direction, thereby the guarantee there is detecting device's the accuracy of detection result.

Another object of the utility model is to provide a there is detection device, wherein microwave sensor based on the doppler effect principle with doppler intermediate frequency signal is right the human body in the target detection area is in there is the high accuracy feedback of the corresponding existence characteristic of action of detection device's detection direction's radial direction, in order to compensate infrared sensor is right there is the low responsivity defect of characteristic in the activity of detection device's detection direction, so in order to ensure there is detection device's the accuracy of detection result.

Another object of the present invention is to provide a presence detecting device, wherein the microwave sensor based on the doppler effect principle with doppler intermediate frequency signal is to the high accuracy feedback that there is the characteristic with the corresponding activity of human removal action, and/or with the fluctuation frequency of the frequency of doppler intermediate frequency signal formed along with the change of time on the range acquires the detection result whether the human body exists to the feedback of the action of a specific frequency range, in order to compensate the infrared sensor is to there is the low responsivity defect of the characteristic in the activity of detecting direction of detecting device, or further compensate the infrared sensor is to including the low responsivity defect of the static limbs action of human body and/or breathing and/or heartbeat action type micro-action, thereby ensure the accuracy of the detection result of presence detecting device.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device includes a circuit board, wherein the infrared sensor and the microwave sensor are disposed at the same side of the circuit board with the detecting direction of the infrared sensor and the detecting direction of the microwave sensor in the same direction, so as to obtain the detecting result of whether the human body exists based on the feedback of the cross-region action of the human body in the target detecting region in the tangential direction of the detecting direction of the presence detecting device, and the microwave sensor is used for the high-precision feedback of the existence characteristic corresponding to the action of the human body in the radial direction of the detecting direction of the presence detecting device, so that the presence detecting device can realize the accurate detection of whether the human body exists.

Another object of the present invention is to provide a presence detecting device, wherein the state of the detection direction of the infrared sensor and the detection direction of the microwave sensor in the same direction is set on the same surface of the circuit board based on the infrared sensor and the microwave sensor, so that the infrared sensor can obtain the detection result of the presence or absence of the human body by the feedback of the cross-zone action of the human body in the tangential direction of the detection direction of the presence detecting device to the target detection area, the microwave sensor can obtain the detection result of the presence or absence of the human body by the doppler effect principle and the high-precision feedback of the doppler intermediate frequency signal to the activity presence characteristic corresponding to the movement of the human body, and/or obtain the detection result of the presence or absence of the human body by the feedback of the fluctuation signal to the action of the specific frequency range, so as to compensate the low-responsiveness defect of the infrared sensor to the activity presence characteristic of the detection direction of the presence detecting device, or further compensate the low-responsiveness defect of the infrared sensor to the micro-actions including the static body actions and/or respiration and/or heartbeat actions, so as to realize the accurate detection of the presence or absence of the human body.

Another object of the present invention is to provide a detection device, wherein the infrared sensor and the microwave sensor are powered separately, so as to ensure the power stability of the infrared sensor and the microwave sensor, avoid the reason the infrared sensor with the microwave sensor starts simultaneously and leads to the operating current sharply to increase and the voltage that leads to is not enough, guarantees the infrared sensor with the operating stability of the microwave sensor, and then ensures the accuracy of the detection result of the detection device.

Another object of the present invention is to provide a presence detecting device, wherein the infrared sensor continuously works after being powered on, and the feedback of the cross-region action of the human body in the tangential direction of the detecting direction of the presence detecting device to the target detecting region obtains the detecting result of the presence or absence of the human body, so as to certainly form the cross-region movement scene characteristic of the human body in view of the entering or leaving action of the human body in the target detecting region, and after the detecting result based on the presence or absence of the human body by the infrared sensor is changed from the presence to the absence, the microwave sensor is started/awakened to compensate the low responsiveness defect of the infrared sensor to the movement of the detecting direction of the presence detecting device, or further compensate the low responsiveness defect of the infrared sensor to the micro-actions including the static body actions of the human body and/or the breathing and/or the heartbeat actions, thereby ensuring the accuracy of the detecting result of the presence detecting device while reducing the average power consumption of the presence detecting device.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device is based on the infrared sensor with whether the linkage of the microwave sensor realizes the accurate detection of the presence of the human body, reducing the false triggering caused by the high-precision feedback of the features of the microwave sensor to the human body activity, and reducing the average power consumption of the presence detecting device at the same time.

Another object of the present invention is to provide a presence detection device, wherein the presence detection device is adapted to be implemented by battery powered mode the presence detection device's wireless networking is facilitated to be simplified the presence detection device's installation and maintenance overhaul, thereby being facilitated to be reduced the presence detection device's installation and maintenance overhaul cost, so as to be facilitated the presence detection device's popularization and application.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device includes a first battery and a second battery, wherein the infrared sensor is powered by the first battery, the microwave sensor is powered by the second battery, or the second battery is used as a pulse power supply to independently supply power to the rf output part of the microwave sensor, thereby avoiding that the infrared sensor and the microwave sensor are powered by the same battery, because the infrared sensor needs a stable power supply voltage and the microwave sensor leads to the instability of the transient working current due to the particularity of its working mode, which easily leads to the rapid increase of the transient working current of the battery, and leads to the voltage drop and is not satisfied with the working voltage of the infrared sensor, which leads to the unstable working of the infrared sensor, thereby ensuring the working stability of the infrared sensor and the microwave sensor, and further ensuring the accuracy of the detection result of the presence detecting device.

Another object of the present invention is to provide a presence detecting device, wherein the microwave sensor is excited by an excitation signal in a state of being activated/awakened to emit a microwave beam corresponding to the frequency of the excitation signal, and receives a reflected echo formed by the microwave beam being reflected by a corresponding object to generate a corresponding echo signal, and generates the doppler intermediate frequency signal corresponding to the frequency or phase difference between the excitation signal and the echo signal in a frequency mixing detection manner based on the doppler effect principle, wherein the amplitude of the doppler intermediate frequency signal is directly related to the energy of the reflected echo formed by the reflection of the moving object and the frequency or phase difference between the echo signal and the excitation signal, and the amplitude of the doppler intermediate frequency signal is proportional to the area of the moving reflection surface and the moving speed of the corresponding object, and inversely proportional to the distance of the object between the detection direction of the presence detection means and the presence detection means, wherein the extent of the influence of the change in the area of the moving reflecting surface and the moving speed of the respective object on the amplitude of the doppler intermediate frequency signal is attenuated in such a way that the area of the moving reflecting surface of the respective object is equivalently substantially reduced, the inversely proportional ratio of the amplitude of the doppler intermediate frequency signal to the distance of the object between the detection direction of the presence detection means and the presence detection means is relatively increased, a definition corresponding mainly to the detection distance of the active presence feature is set for the respective threshold value of the amplitude of the doppler intermediate frequency signal, and the attenuation caused by the penetrating behavior and the reflecting behavior of the microwaves on the basis of the penetrating property and the reflecting property is equivalent to a reduction in the detection distance, that is, the activity presence feature of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwave has a relatively low amplitude in the doppler intermediate frequency signal, thereby allowing the shielding based on the corresponding threshold setting for the amplitude of the doppler intermediate frequency signal, and therefore, when the presence or absence of the human body is detected with the high-precision feedback of the doppler intermediate frequency signal to the activity presence feature corresponding to the human body movement, the effective detection space of the activity presence feature based on the doppler intermediate frequency signal by the presence detection apparatus can be precisely defined to match with the corresponding target detection region according to the corresponding threshold setting, thereby eliminating the environmental interference of the non-target detection region, such as the interference of the activity presence feature of the non-target detection region diffused/diffused and diffused through the wall based on the penetration characteristic and the reflection characteristic of the microwave.

Another object of the present invention is to provide a presence detecting device, wherein the mode of the motion plane of reflection area through the equivalent reduces corresponding object by a wide margin, corresponds the range span that has the characteristic with the corresponding activity of human removal action in the doppler intermediate frequency signal is narrowed, so in order to be favorable to being based on the range span that has the characteristic in the corresponding activity in the doppler intermediate frequency signal sets for the environment action interference of getting rid of effective detection space according to corresponding threshold value, has improved promptly the relevance degree that has the characteristic with the activity in the target detection region in the doppler intermediate frequency signal and the target detection region exist the characteristic and get rid of the environment action interference in the target detection region with the corresponding activity of human removal action in the accurate feedback target detection region.

Another object of the present invention is to provide a presence detecting device, wherein it is right through the duty cycle setting of excitation signal, specifically sets up excitation signal is less than 1 second and the duty cycle is less than 10% intermittent signal for pulse operating time, in order to form microwave sensor is right the intermittent emission of microwave beam and the equivalent that forms the motion plane of reflection area to corresponding object reduce, thereby be favorable to based on right the threshold value setting of doppler intermediate frequency signal gets rid of the environment action interference in effective detection space and the formation of the effective detection space that has the characteristic to the activity defines, exists the environment interference outside the target detection area and the environment action interference in target detection area in effective detection space that the characteristic exists the activity and corresponding target detection area assorted state promptly and resists, and is favorable to maintaining microwave sensor's low-power consumption.

Another object of the present invention is to provide a presence detecting device, wherein when detecting the action characteristic of the human body in the specific frequency range by the feedback of the fluctuation signal to the action of the specific frequency range, specifically when the specific frequency range is in the frequency range smaller than 50Hz and the detection is performed to the micro action including the respiration and/or heartbeat action of the human body, the specific frequency range is in the extremely low frequency of electromagnetic silence, the high-magnification amplification of the fluctuation signal in the specific frequency range does not affect the accuracy of the fluctuation signal in the specific frequency range, correspondingly, the fluctuation in the fluctuation signal corresponding to the micro action of the respiration and/or heartbeat action of the human body is allowed to be identified by the high-magnification amplification, so as to realize the independent accurate detection of the static presence characteristic corresponding to the micro action of the heartbeat and/or respiration of the human body based on the selection of the specific frequency range, so as to accurately detect the presence or absence of the human body based on the representation of the life characteristic of the respiration and/or heartbeat action.

Another object of the present invention is to provide a presence detection apparatus, wherein the amplitude of the corresponding fluctuation signal is directly related to the motion amplitude of the human body under the same distance limitation, wherein the corresponding threshold setting for the amplitude of the fluctuation signal mainly corresponds to the definition of the detection distance for the static presence feature due to the narrower amplitude span of the heartbeat and/or breathing type micro motion of the human body, and the attenuation caused by the penetration behavior and the reflection behavior of the microwave based on the penetration characteristic and the reflection characteristic is equivalent to the reduction in the detection distance, i.e., the static presence feature of the non-target detection region diffused based on the penetration characteristic and the reflection characteristic of the microwave has a relatively lower fluctuation amplitude in the fluctuation signal, thereby allowing the shielding based on the corresponding threshold setting for the amplitude of the fluctuation signal, so that the effective detection space of the static presence feature of the fluctuation signal based on the polar rate can be accurately defined and matched with the corresponding target detection region, thereby eliminating the environmental interference of the non-target detection region, e.g., the low frequency penetration characteristic and the reflection characteristic of the microwave based on the penetration characteristic and the diffusion characteristic of the detection signal can be accurately defined and matched with the corresponding target detection region of the static presence detection region.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device obtains the detecting result of the presence or absence of the human body based on the feedback of the cross-zone motion of the human body in the target detecting region in the tangential direction of the detecting direction of the presence detecting device by the infrared sensor, and obtains the detecting result of the presence or absence of the human body based on the doppler effect principle by the doppler intermediate frequency signal for the high-precision feedback of the presence characteristic of the motion corresponding to the movement of the human body, and/or obtains the detecting result of the presence or absence of the human body by the feedback of the motion of the specific frequency range by the fluctuation signal, so as to compensate the low-responsiveness defect of the activity presence characteristic of the infrared sensor in the detecting direction of the presence detecting device, or further compensate the low-responsiveness defect of the infrared sensor for the micro motion including the static body motion and/or the breathing and/or the heartbeat motion, i.e. avoid the infrared sensor being unable to detect the presence characteristic of the motion in the radial direction of the presence detecting device, or further avoid the static infrared sensor being unable to detect the presence characteristic of the motion and/or heartbeat and the micro motion in the detecting device, thereby achieving the accurate detection range of the detection of the presence detecting device by the microwave.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device includes a communication module, wherein the communication module is used for sending a control signal corresponding to the detection result of the infrared sensor and/or the microwave sensor to at least one electrical device to control the operating status of the electrical device, so as to realize the intelligent control of the electrical device based on the detection result of the presence or absence of the human body in the detection region.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device is further based on the human body in detecting the behavior state control of the area the operating status of the electrical equipment, if based on the human body existing in the static state detecting area, or the human body existing in the active state detecting area, or the human body entering in the active state detecting area control with the mode of the electrical equipment adjusts parameters such as illumination, temperature, humidity, so as to realize the right intelligent control of the electrical equipment.

Another object of the present invention is to provide a presence detecting device, wherein the communication module sends with wireless mode control signal, so as to make presence detecting device can realize with wireless mode right electrical equipment or other presence detecting device's network deployment, thereby be favorable to simplifying presence detecting device's installation and maintenance and overhaul, and then be favorable to reducing presence detecting device's installation and maintenance and overhaul cost are favorable to presence detecting device's popularization and application.

Another object of the present invention is to provide a presence detecting device, wherein the presence detecting device includes a housing, wherein the housing includes a housing and a detecting cover, wherein the housing has a receiving slot and a communicating slot extending from one of the housing to the inside thereof, the circuit board is provided with the infrared sensor and the microwave sensor with one side facing the housing the detecting slot is accommodated in the receiving slot, wherein the detecting cover is detachably disposed in the housing with the facing mode of the detecting slot to form a shielding of the detecting slot, wherein the detecting cover is provided with a lens window, wherein the fresnel lens is used to pass through the lens window to realize the partition of the tangential direction of the detecting direction of the presence detecting device to the target detecting area.

According to one aspect of the present invention, the present invention provides a presence detecting device, wherein the presence detecting device includes an infrared sensor, a microwave sensor, a fresnel lens, a circuit board, a first battery and a second battery, wherein the infrared sensor and the microwave sensor are disposed on the same plane of the circuit board in a state in which a detecting direction of the infrared sensor and a detecting direction of the microwave sensor are in the same direction, the first battery supplies power to the infrared sensor, the second battery supplies power to the microwave sensor or independently supplies power as a pulse power source to a radio frequency output portion of the microwave sensor, the fresnel lens is disposed in a path of the detecting direction of the infrared sensor to realize a partition of a target detection region in a tangential direction of the detecting direction of the presence detecting device, wherein the detection direction of the infrared sensor and the detection direction of the microwave sensor in the same direction are the detection direction of the presence detection device, wherein the infrared sensor detects the detection result of the presence or absence of a human body by the feedback of the trans-regional movement of the human body in the target detection region in the tangential direction of the detection direction of the presence detection device, wherein the microwave sensor is excited by an excitation signal to emit at least one microwave beam corresponding to the frequency of the excitation signal, and receives a reflected echo formed by the reflection of the microwave beam by a corresponding object to generate a corresponding echo signal to detect the target detection region, so as to feed back the activity presence characteristic corresponding to the movement of the human body by a doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal based on the doppler effect principle, and/or obtaining the detection result of the existence of the human body by the feedback of the fluctuation frequency of a fluctuation signal formed by the change of the frequency of the Doppler intermediate frequency signal along with the time to the action of the corresponding frequency so as to compensate the defect of low responsiveness of the infrared sensor to the movement existence characteristic of the radial direction of the detection direction of the existence detection device, or further compensate the defect of low responsiveness of the infrared sensor to micro-actions including the static limb actions and/or the breathing and/or the heartbeat actions of the human body.

In one embodiment, the presence detecting device includes a housing including a case, wherein the case has a receiving groove extending from a face of the case toward an inside thereof and a detecting port communicating with the receiving groove, and the circuit board is received in the receiving groove in such a manner that a face thereof provided with the infrared sensor and the microwave sensor faces the detecting port of the case.

In one embodiment, the housing includes a detection mask, wherein the detection mask is removably disposed in the housing toward the detection port.

In an embodiment, wherein the detection mask is provided with a lens window, wherein the fresnel lens effects a partitioning of the target detection region in a tangential direction to the detection direction of the presence detection means in such a way that it passes through the lens window.

In an embodiment, wherein the detection mask is provided with a lens window, wherein the fresnel lens is fixed to the lens window to achieve a partitioning of the target detection area in a tangential direction to the detection direction of the presence detection means.

In one embodiment, the other side of the housing is provided with two battery slots, wherein the first battery and the second battery are mounted in the two battery slots.

In one embodiment, the housing includes a rear cover, wherein the rear cover is detachably disposed on a side of the case where the battery well is disposed.

In an embodiment, wherein the infrared sensor is powered on and then continuously operated, the presence detecting device is configured to activate/wake up the microwave sensor after a change from yes to no based on a detection result of the infrared sensor on the presence or absence of the human body.

In one embodiment, the presence detecting device includes a processor, wherein the infrared sensor and the microwave sensor are communicatively connected to the processor, and the processor generates a control signal based on the detection of the presence of the human body by the infrared sensor and the microwave sensor.

In an embodiment, the infrared sensor is powered on and then works continuously, and the microwave sensor is powered/excited under the control of the processor, wherein the processor is configured to control the microwave sensor to be powered/excited at least once based on the power/excitation of the microwave sensor after the detection result of the infrared sensor on the existence or nonexistence of the human body is changed from yes to no.

In one embodiment, the presence detection device includes a communication module, wherein the communication module is communicatively coupled to the processor to transmit the control signal.

In one embodiment, the communication module wirelessly transmits the control signal.

In one embodiment, the processor is configured as a chip in an integrated circuit.

In one embodiment, the microwave sensor is packaged in the chip.

In one embodiment, the presence detection device comprises a charging interface, and the first battery and the second battery are electrically connected to the charging interface so as to be charged via the charging interface.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1 is a schematic perspective view of an existence detecting device according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the presence detecting device according to the above embodiment of the present invention.

Fig. 3 is a disassembled schematic view of the presence detecting device according to the above embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms are not to be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Referring to fig. 1 and 2 of the drawings of the present application, a presence detection device 10 according to an embodiment of the present invention is illustrated, wherein the presence detection device 10 includes an infrared sensor 11, a microwave sensor 122, a fresnel lens 13 and a circuit board 14, wherein the fresnel lens 13 is disposed in a path of a detection direction of the infrared sensor 11 to realize a partition of a target detection area in a tangential direction of the detection direction of the presence detection device 10, the infrared sensor 11 obtains a detection result of presence or absence of a human body from a feedback of a transregional action of the human body in the tangential direction of the detection direction of the presence detection device 10 in the target detection area, wherein the microwave sensor 12 obtains a detection result of presence of a human body from a doppler effect principle with a high accuracy of a doppler intermediate frequency signal to an action presence characteristic of an activity corresponding to a movement of a human body, and/or obtains a feedback of an action of a fluctuation frequency of a fluctuation signal in an amplitude to a specific frequency range based on a doppler effect of the doppler intermediate frequency signal to compensate a change of the frequency of the doppler intermediate frequency over time of the doppler intermediate frequency signal to compensate a detection result of presence of a detection result of a human body presence or a detection result of a detection defect of a heartbeat of a detection device 10, thereby ensuring accuracy of a detection of a presence or a detection device including a low presence of a detection defect of a detection of a human body by the infrared sensor 11 and/or a heartbeat sensor 11.

In particular, the infrared sensor 11 and the microwave sensor 12 are disposed on the same plane of the circuit board 14 in a state that the detection direction of the infrared sensor 11 and the detection direction of the microwave sensor 12 are in the same direction, wherein the detection direction of the infrared sensor 11 and the detection direction of the microwave sensor 12 in the same direction are the detection direction of the presence detection device 10, and the detection result of the presence or absence of a human body is obtained based on the feedback of the transzone motion of the infrared sensor 11 to the human body in the target detection region in the tangential direction of the detection direction of the presence detection device 10, and the high-precision feedback of the presence characteristic corresponding to the motion of the microwave sensor 12 to the human body in the target detection region in the radial direction of the detection direction of the presence detection device 10, so that the presence detection device 10 can realize accurate detection of the presence or absence of a human body.

It is worth mentioning that, based on the fact that the infrared sensor 11 and the microwave sensor 12 are disposed on the same surface of the circuit board 14 in a state that the detection direction of the infrared sensor 11 and the detection direction of the microwave sensor 12 are in the same direction, the presence detection device 10 obtains the detection result of the presence or absence of the human body by the feedback of the infrared sensor 11 to the transregional motion of the human body in the target detection region in the tangential direction of the detection direction of the presence detection device 10, and obtains the detection result of the presence or absence of the human body by the feedback of the microwave sensor 12 to the motion existence characteristic corresponding to the movement of the human body by the doppler intermediate frequency signal based on the doppler effect principle, and/or obtains the detection result of the motion existence or absence of the human body by the feedback of the fluctuation signal to the specific frequency range, so as to compensate the low responsiveness defect of the motion existence characteristic of the infrared sensor 11 to the motion in the radial direction of the detection direction of the presence detection device 10, or further compensate the low responsiveness defect of the infrared sensor 2 to the micro motion including the static body limb motion and/or the heartbeat motion, thereby ensuring the accuracy of the detection result.

It should be noted that, the presence detection apparatus 10 is based on the partition of the fresnel lens 13 on the detection region, so that the detection range of the infrared sensor 11 on the presence of the human body can be precisely controlled to avoid being interfered by actions outside the detection region, and the stability of the presence detection apparatus 10 is improved, thereby ensuring the accuracy of the detection result of the presence detection apparatus 10.

In particular, wherein the microwave sensor 12 is excited by an excitation signal in an activated/awakened state to emit a microwave beam corresponding to the frequency of the excitation signal, and receives a reflected echo formed by the microwave beam reflected by a corresponding object to generate a corresponding echo signal, and generates the doppler intermediate frequency signal corresponding to the frequency or phase difference between the excitation signal and the echo signal in a frequency-mixing detection manner based on the doppler effect principle, it is worth mentioning that, wherein the amplitude of the doppler intermediate frequency signal is directly related to the energy level of the reflected echo formed by the reflection of the moving object and the frequency or phase difference value between the corresponding echo signal and the excitation signal, the amplitude of the doppler intermediate frequency signal is proportional to the area of the moving reflection surface and the movement speed of the corresponding object and inversely proportional to the distance between the object in the detection direction of the presence detection device and the presence detection device, wherein the degree of influence of the change of the area of the moving reflecting surface and the moving speed of the respective object on the amplitude of the doppler intermediate frequency signal is weakened in such a way that the area of the moving reflecting surface of the respective object is equivalently and substantially reduced, the inverse proportion of the amplitude of the doppler intermediate frequency signal to the distance between the detection direction of the presence detection means and the presence detection means of the object is relatively increased, a definition is set for the respective threshold values of the amplitude of the doppler intermediate frequency signal which mainly corresponds to the detection distance of the active presence feature, and the attenuation caused by the penetration behavior and the reflection behavior of the microwave based on the penetration characteristic and the reflection characteristic is equivalent to the reduction in the detection distance, that is, the active presence feature of the non-target detection region which is diffused based on the penetration characteristic and the reflection characteristic of the microwave is equivalently and substantially reduced in the doppler intermediate frequency signal The signals have relatively low amplitudes, thereby allowing the shielding based on the corresponding threshold settings for the amplitudes of the doppler intermediate frequency signals, so that, when detecting the presence or absence of a human body with high-precision feedback of the doppler intermediate frequency signals to the activity presence features corresponding to the motion of the human body, the effective detection space of the activity presence features based on the doppler intermediate frequency signals can be precisely defined to match the corresponding target detection area according to the corresponding threshold settings, thereby eliminating the environmental interference of non-target detection areas, such as the interference of the activity presence features of the non-target detection areas due to the wall-through diffusion and the reflection/diffusion based on the penetration characteristics and the reflection characteristics of microwaves, so as to accurately detect the presence of a human body with high-precision feedback of the activity presence features corresponding to the motion of the human body based on the corresponding amplitudes of the doppler intermediate frequency signals in the frequency spectrum, energy spectrum, power spectrum or amplitude.

It is worth mentioning that, by equivalently and greatly reducing the area of the motion reflecting surface of the corresponding object, the amplitude span corresponding to the motion existence feature corresponding to the human body motion in the doppler intermediate frequency signal is narrowed, so as to be beneficial to setting and eliminating the environmental motion interference of the effective detection space according to the corresponding amplitude threshold value of the doppler intermediate frequency signal on the frequency spectrum, the energy spectrum, the power spectrum or the amplitude based on the amplitude span corresponding to the motion existence feature in the doppler intermediate frequency signal, that is, the relevance between the doppler intermediate frequency signal and the motion existence feature in the target detection area is improved, so that the motion existence feature corresponding to the human body motion in the target detection area can be accurately fed back, and the environmental motion interference of the target detection area can be eliminated.

Specifically, in this embodiment of the present invention, the duty ratio setting of the excitation signal is specifically set to an intermittent signal with a pulse duty cycle less than 1 second and a duty cycle less than 10%, so as to form the intermittent emission of the microwave beam by the presence detection device and form an equivalent reduction of the area of the motion reflecting surface of the corresponding object, thereby facilitating the setting of the corresponding amplitude threshold of the doppler intermediate frequency signal in the frequency spectrum, the energy spectrum, the power spectrum or the amplitude to exclude the environmental motion interference of the effective detection space and form the precise definition of the effective detection space of the activity presence feature, that is, the environmental interference outside the target detection region and the environmental motion interference of the target detection region are resisted in the state of matching the effective detection space of the activity presence feature and the corresponding target detection region, and simultaneously facilitating the maintenance of the low power consumption state of the microwave sensor 12.

In particular, when the feedback of the fluctuation signal to the motion of the specific frequency range is used for detecting the motion characteristic of the human body in the specific frequency range, particularly when the specific frequency range is in a frequency range smaller than 50Hz and the micro motion of the human body breathing and/or heartbeat motion is detected, the specific frequency range is at the extremely low frequency of electromagnetic silence, the high-magnification amplification of the fluctuation signal in the specific frequency range does not influence the accuracy of the fluctuation signal in the specific frequency range, and correspondingly, the fluctuation corresponding to the micro motion of the human body breathing and/or heartbeat motion in the fluctuation signal is allowed to be identified in a high-magnification manner, so that the independent accurate detection of the static existing characteristic corresponding to the micro motion of the human body and/or breathing motion based on the selection of the specific frequency range is realized, the environmental interference of an effective detection space is eliminated, and the accurate detection of the existence state of the human body and the heartbeat based on the embodiment of the life characteristic of the human body breathing and/or heartbeat motion is realized.

It is worth mentioning that, under the same distance constraints, the amplitude of the respective fluctuating signal is directly related to the motion amplitude of the human body, wherein, in a state in which the excitation signal is an intermittent signal with a pulse on time of less than 1 second and a duty cycle of less than 10%, the fluctuating signal being further reduced in frequency spectrum, energy spectrum, power spectrum or amplitude corresponding to the human body heartbeat and/or respiratory motion amplitude span, due to the human body heartbeat and/or respiratory motion having a narrower amplitude span, the setting of the respective amplitude threshold of the fluctuating signal in frequency spectrum, energy spectrum, power spectrum or amplitude mainly corresponds to the definition of the detection distance of the static presence feature corresponding to the human body heartbeat and/or respiratory-like micromotion, and the attenuation of the microwaves due to the penetration and reflection behavior based on the penetration and reflection characteristics is equivalent to the reduction in the detection distance, i.e. the static presence feature of the non-target detection region spanned based on the penetration and reflection characteristics of the microwaves has a relatively lower amplitude in the fluctuating signal, thereby allowing the setting of the respective threshold based on the amplitude of the detection signal and the static presence feature of the microwaves due to the diffusion and the elimination of the static presence feature of the detection device based on the low frequency spectrum and/or the low frequency spectrum of the detection signal.

In other words, the presence detecting device 10 detects the presence of motion in the target detection area based on the infrared sensor 11, and obtains the detection result of the presence or absence of human body based on the feedback of the microwave sensor 12 to the presence of motion in the target detection area by the doppler intermediate frequency signal based on the doppler effect principle, and/or to the feedback of the motion in the specific frequency range by the fluctuation signal, so as to compensate the low responsiveness defect of the infrared sensor 11 to the presence of motion in the detection direction of the presence detecting device 10, or further compensate the low responsiveness defect of the infrared sensor 2 to the micro motion including the static body motion and/or respiration and/or heartbeat motion of human body, that is, to avoid the defect that the infrared sensor 11 cannot detect the presence of motion in the radial direction of the detection direction of the presence detecting device 10, or further avoid the defect that the infrared sensor 11 cannot detect the static presence of motion corresponding to the heartbeat and/or respiration motion of human body, and at the problem that the detection range of the presence and/or absence of motion of the detection by the infrared sensor 12 cannot be accurately controlled so as to the extent that the detection of the presence of motion and/or the static motion can be accurately controlled by the microwave, thereby realizing the accurate detection of the presence of human body.

In particular, in this embodiment of the present invention, in order to reduce the average power consumption of the presence detecting device 10 while ensuring the accuracy of the detection result of the presence detecting device 10, the infrared sensor 11 is continuously operated after being powered on to obtain the detection result of the presence or absence of the human body in the feedback of the transregional action of the human body in the direction tangential to the detection direction of the presence detecting device 10 in the target detection region, wherein the presence detecting device 10 activates/wakes up the microwave sensor 12 after the presence or absence of the detection result of the human body by the infrared sensor 11 is changed from the presence to the absence in view of the scene characteristic that the entering or leaving action of the human body in the target detection region necessarily forms the transregional movement of the human body, so as to compensate the low responsiveness defect of the infrared sensor 11 in the presence characteristic of the activity of the presence or absence of the human body in the detection direction of the presence detecting device 10, or further compensate the low responsiveness defect of the infrared sensor 11 in the micro-actions including the static body limb action and/or breathing and/or heartbeat action, thereby enabling the accuracy of the presence detecting device 10 to be ensured while reducing the average power consumption of the presence detecting device 10.

It is worth mentioning that, the presence detection device 10 realizes accurate detection of the presence of the human body based on the linkage of the infrared sensor 11 and the microwave sensor 12, so as to reduce false triggering caused by high-precision feedback of the microwave sensor 12 on the presence characteristics of the human body activity, reduce the average power consumption of the presence detection device 10, and improve the practicability of the presence detection device 10.

In particular, since the average power consumption of the presence detection apparatus 10 is reduced, the presence detection apparatus 10 can be adapted to be battery powered, and wireless networking of the presence detection apparatus 10 can be achieved in a battery powered manner, which facilitates simplifying installation and maintenance servicing of the presence detection apparatus 10, and thus reducing installation and maintenance servicing costs of the presence detection apparatus 10, thus facilitating widespread use of the presence detection apparatus 10.

In particular, wherein the presence detection device 10 comprises a first battery 15 and a second battery 16, the infrared sensor 11 and the microwave sensor 12 being powered on the basis of the first battery 15 and the second battery 16, in particular, wherein, since the operation of the infrared sensor 11 requires a stable supply voltage, while the microwave sensor 12 operates in a narrow pulse mode, the transient operating current thereof varies greatly, and a sudden change in the transient operating current of the microwave sensor 12 affects the stability of the power supply network employing the infrared sensor 11, while, in a state in which the infrared sensor 11 and the microwave sensor 12 employ the same power supply network, the transient operating current of the microwave sensor 12 operating in a pulse mode varies greatly, the transient operating current of the power supply network varies sharply, causing a drop in the voltage of the power supply, and possibly being lower than the voltage value required for the infrared sensor 11 to supply, causing the infrared sensor 11 to operate unstably with low detection accuracy and inaccurate detection, in this embodiment, it is preferred that the infrared sensor 11 and the microwave sensor 12 are powered separately, in particular, wherein the first battery 11 is powered by the second battery 15, the microwave sensor 12 is powered by the same power supply circuit, so as the microwave sensor 12 is powered on the output of the microwave sensor 12, to avoid a sudden increase in the output of the microwave sensor 12, which the microwave sensor 12 operating current is supplied as a sudden change in the pulse mode, the voltage is reduced, the working voltage of the infrared sensor 11 is not satisfied, and the working of the infrared sensor 11 is unstable, so that the working stability of the infrared sensor 11 and the microwave sensor 12 is ensured, the accuracy of the detection result of the presence detection device 10 is further ensured, and the dual requirements of the presence detection device 10 on direct current power supply and pulse power supply are satisfied based on the dual-battery power supply form, so that the circuit design of the presence detection device 10 is simplified.

Further, the presence detecting device 10 includes a housing 10A, wherein the housing 10A includes a casing 101 and a detecting mask 102, wherein the casing 101 has a receiving groove 1011 extending from a surface thereof toward an inside thereof and a detecting port 1012 communicating with the receiving groove 1011, wherein the circuit board 14 is received in the receiving groove 1011 in such a manner that a surface thereof on which the infrared sensor 11 and the microwave sensor 12 are disposed faces the detecting port 1012 of the casing 101, such that a direction in which the detecting port 1012 faces is a detecting direction of the presence detecting device 10. Wherein the detection mask 102 is detachably disposed on the housing 101 in a manner facing the detection port 1012 to form a shield for the detection port 1012, wherein the detection mask 102 is disposed with a lens window 1021, wherein the fresnel lens 13 is fixed on the lens window 1021 to realize a partition of the target detection region in a tangential direction of the detection direction of the presence detection device 10, and in some embodiments of the present invention, wherein the fresnel lens 13 realizes a partition of the target detection region in a tangential direction of the detection direction of the presence detection device 10 in a manner of passing through the lens window 1021.

Specifically, in this embodiment of the present invention, the detecting face mask 102 is disposed on the housing 101 in a fastening manner, specifically, the detecting face mask 102 includes at least one buckle 1022, the housing 101 includes a locking slot 1013 corresponding to the shape and number of the buckle 1022, wherein the detecting face mask 102 is detachably disposed on the housing 101 in a manner that the buckle 1022 is fastened to the locking slot 1013, and in some embodiments of the present invention, the detecting face mask 102 may be disposed on the housing 101 in a magnetic attraction manner, or the detecting face mask 102 is disposed on the housing 101 in a screw fixing manner, or the detecting face mask 102 is integrally formed on the housing 101, etc., that is, the connection manner between the housing 101 and the detecting face mask 102 may be varied, which is not limited by the present invention.

Further, the other side of the housing 101 is provided with two battery slots 1014, wherein the first battery 15 and the second battery 16 are mounted in the two battery slots 1014, and in this embodiment, the first battery 15 and the second battery 16 are detachably mounted in the battery slots 1014.

In particular, in some embodiments of the present invention, wherein the first battery 15 and the second battery 16 are configured to be integrally mounted to the housing 10A, wherein the presence detecting device 10 includes a battery compartment, the first battery 15 and the second battery 16 are mounted in the battery compartment, the housing 10A is configured with a battery cavity adapted to a shape of the battery compartment, wherein the battery compartment is detachably mounted to the battery cavity, for example, but not limited to, being disposed in the battery compartment in a drawing manner, being disposed in the battery compartment in a flip-open manner, and the like, so as to facilitate replacement and use of the batteries, further facilitating maintenance of the presence detecting device 10.

It is worth mentioning that in this embodiment of the present invention, wherein the first battery 15 and the second battery 16 are rechargeable batteries, wherein the presence detection device 10 comprises a charging interface 17, wherein the first battery 15 and the second battery 16 are electrically connected to the charging interface 17, such that when the charging interface 17 is connected to a power source, the first battery 15 and the second battery 16 are charged, thereby further facilitating the maintenance of the presence detection device 10 and the application of the presence detection device 10.

Further, the presence detecting device 10 includes a processor 18, wherein the infrared sensor 11 and the microwave sensor 12 are communicatively connected to the processor 18, and the processor 18 generates a control signal based on the detection result of the infrared sensor 11 and the microwave sensor 12 on the presence or absence of the human body, wherein the control signal is used to control the operating state of at least one electrical device, such as controlling a lamp to be in an illuminating state based on the determination result of the presence of the human body in the detection area and controlling the lamp to be in an extinguishing state based on the determination result of the absence of the human body in the detection area, so as to realize intelligent control over the electrical device based on the determination result of the presence or absence of the human body in the detection area.

It is worth mentioning that the presence detection apparatus 10 allows to control the working state of the electrical device based on the behavior state of the human body in the detection area, for example, based on the fact that the human body is present in the detection area in a static state, or the human body is present in the detection area in an active state, or the human body enters the detection area in an active state to control parameters such as light, temperature, humidity, etc. to be adjusted in the manner of the electrical device, thereby realizing intelligent control of the electrical device.

It can be understood that the electrical devices may be implemented as one of a lamp, an air conditioner, a fresh air system, an exhaust fan, a sound, a humidifier, an aromatherapy machine, an intelligent curtain, a television, and an electric door lock, and the number of the electrical devices is not limited, so as to implement the combined control of the corresponding working states of different electrical devices based on the judgment of the behavior state of the human body in the detection area, thereby implementing the intelligent context control.

Specifically, wherein presence detection device 10 includes a communication module 19, wherein communication module 19 is communication connected in processor 18, in order to send control signal to electrical equipment, it is worth mentioning that in this embodiment of the utility model, wherein communication module 19 sends control signal with wireless mode, so that presence detection device 10 can realize the network deployment to electrical equipment or other presence detection devices with wireless mode, thereby is favorable to simplifying the installation and maintenance of presence detection device 10, and then is favorable to reducing the installation and maintenance cost of presence detection device 10, is favorable to the popularization and application of presence detection device 10.

In particular, wherein the microwave sensor 12 is powered/energized under the control of the processor 18, in particular, wherein the infrared sensor 11 is powered/energized continuously after being powered on, the microwave sensor 12 is powered/energized under the control of the processor, wherein the processor 18 is configured to activate/wake up the microwave sensor 12 at least once based on the power/energization control of the microwave sensor 12 after a change from yes to no based on the detection result of the infrared sensor 11 on the presence or absence of the human body, so as to compensate for a low responsiveness defect of the infrared sensor 11 on the activity presence characteristic in a radial direction of the detection direction of the presence detection device 10, or further compensate for a low responsiveness defect of the infrared sensor 11 on the micro-actions including the human body static limb actions and/or breathing and/or heartbeat actions, thereby ensuring the accuracy of the detection result of the presence detection device 10 while reducing the average power consumption of the presence detection device 10.

It should be noted that, in the embodiment of the present invention, the processor 18 is designed as an integrated circuit and is configured as a chip 18A, so as to improve the integration level of the presence detection apparatus 10, which is beneficial to simplify the circuit design of the presence detection apparatus 10 and improve the reliability of the presence detection apparatus 10.

In particular, wherein the microwave sensor 12 is packaged on the chip 18A, thereby further improving the integration of the presence detection apparatus 10, in some embodiments of the present invention, the communication module 19 is also integrated on the chip 18A, while in other embodiments of the present invention, the microwave sensor 12 is independently disposed, the processor 18 and the communication module 19 are integrated on the chip 18A, or the processor 18 and the communication module 19 are independently disposed, which is not limited by the present invention.

Further, wherein the housing 10A includes a rear cover 103, wherein the rear cover 103 is detachably disposed on a surface of the housing 101 where the battery chamber 1014 is disposed, so as to shield the battery chamber 1014, in this embodiment of the present invention, wherein the rear cover 103 is also disposed on the housing 101 in a fastening manner, wherein the rear cover 103 includes at least one mounting groove 1031, the housing 101 includes mounting fasteners 1015 corresponding to the form and number of the mounting grooves 1031, and the rear cover 103 is detachably disposed on the housing 101 in a manner that the mounting grooves 1031 are fastened by the mounting fasteners 1015, in particular, in some embodiments of the present invention, the rear cover 103 and the housing 101 are disposed with corresponding screw holes, so that the rear cover 103 is detachably disposed on the housing 101 under connection of corresponding screws, in other embodiments of the present invention, wherein the rear cover 103 is disposed on the housing 101 in a manner, and in still other embodiments of the present invention, the rear cover 103 is integrally formed on the housing 101, that the rear cover 103 is magnetically attached with the housing 101 in a variety of manners.

In particular, in some embodiments of the present invention, wherein the rear cover 103 has an annular groove facing the recess of the housing 101 to connect with the corresponding universal seat to realize the steerable installation of the presence detection device 10, in some embodiments of the present invention, the presence detection device 10 can be installed in the corresponding installation area by adopting a magnetic attraction manner, or in the corresponding installation area by adopting a screw fixation manner, and the present invention is not limited thereto.

That is, the presence detecting device 10 obtains the detection result of the presence or absence of the human body with the feedback of the transregional action of the infrared sensor 11 to the human body in the target detection region in the tangential direction to the detection direction of the presence detecting device 10, and obtains the detection result of the presence or absence of the human body with the feedback of the doppler intermediate frequency signal to the activity presence characteristic corresponding to the human body moving action with the feedback of the wave signal to the action of the specific frequency range with the feedback of the microwave sensor 12 based on the doppler effect principle to compensate for the low responsiveness defect of the infrared sensor 11 to the activity presence characteristic in the radial direction to the detection direction of the presence detecting device 10 or further compensate for the low responsiveness defect of the infrared sensor 11 to the micro-actions including the static limb action and/or the breathing and/or the heartbeat action of the human body, while the presence detecting device 10 is adapted to be integrally flexibly mounted in the corresponding mounting region based on the design of the housing 10A, while enabling a flexible adjustment of the detection angle, and while reducing the average power consumption of the presence detecting device 10 based on the linked settings of the infrared sensor 11 and the microwave sensor 122, thereby facilitating the use of the presence detecting device 10 for the use of the practical presence detecting device.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (15)

1. Presence detection device, characterized in that it comprises: an infrared sensor, a microwave sensor, a fresnel lens, a circuit board, a first battery and a second battery, wherein the infrared sensor and the microwave sensor are disposed on the same surface of the circuit board in a state that the detection direction of the infrared sensor and the detection direction of the microwave sensor are in the same direction, the first battery supplies power to the infrared sensor, the second battery supplies power to the microwave sensor or independently supplies power to the rf output portion of the microwave sensor as a pulse power source, the fresnel lens is disposed on a path of the detection direction of the infrared sensor to realize a partition of a target detection area in a tangential direction of the detection direction of the presence detection device, wherein the detection direction of the infrared sensor and the detection direction of the microwave sensor in the same direction are the detection direction of the presence detection device, wherein the infrared sensor detects the detection result of the presence or absence of a human body in the target detection area by feeding back the transregional movement of the human body in the tangential direction of the detection direction of the presence detection device, wherein the microwave sensor is excited by an excitation signal to emit at least one microwave beam with a frequency corresponding to the excitation signal, and receives a reflected echo formed by the reflection of the microwave beam by a corresponding object to generate a corresponding echo signal to detect the target detection area, so as to obtain the feedback of the movement presence characteristic corresponding to the movement of the human body by a doppler intermediate frequency signal corresponding to the frequency/phase difference between the excitation signal and the echo signal based on the doppler effect principle, and/or obtain the feedback of the movement of the corresponding frequency by the fluctuation frequency of a fluctuation signal in amplitude formed by the change of the frequency of the doppler intermediate frequency signal with time And (3) detecting whether the human body exists or not so as to compensate the defect of low responsiveness of the infrared sensor to the movement existence characteristic in the radial direction of the detection direction of the existence detection device, or further compensate the defect of low responsiveness of the infrared sensor to micro-movements including static limb movements and/or breathing and/or heartbeat movements of the human body.

2. The presence detecting device according to claim 1, wherein the presence detecting device includes a housing including a case, wherein the case has a housing groove extending from a face of the case toward an inside thereof and a detection port communicating with the housing groove, wherein the circuit board is housed in the housing groove in such a manner that a face thereof provided with the infrared sensor and the microwave sensor faces the detection port of the case.

3. The presence detection apparatus as claimed in claim 2, wherein said housing includes a detection mask, wherein said detection mask is removably mounted to said housing in a manner facing said detection port.

4. The presence detection apparatus according to claim 3, wherein the detection mask is provided with a lens window, wherein the Fresnel lens effects a partitioning of the target detection area in a direction tangential to the detection direction of the presence detection apparatus in such a way as to pass through the lens window.

5. The presence detection apparatus according to claim 3, wherein the detection mask is provided with a lens window, wherein the Fresnel lens is fixed to the lens window to realize a partition of the target detection region in a direction tangential to a detection direction of the presence detection apparatus.

6. The presence detection apparatus as claimed in claim 3, wherein the other face of the housing is provided with two battery slots, wherein the first battery and the second battery are mounted to both of the battery slots.

7. The presence detection apparatus as claimed in claim 6, wherein the housing includes a back cover, wherein the back cover is detachably provided to a face of the case where the battery well is provided.

8. The presence detection apparatus according to any one of claims 1 to 7, wherein said infrared sensor is continuously operated after being powered on, said presence detection apparatus being configured to activate/wake up said microwave sensor after a change from yes to no based on a detection result of said infrared sensor on presence or absence of a human body.

9. The presence detection apparatus as claimed in any one of claims 1 to 7, wherein said presence detection apparatus comprises a processor, wherein said infrared sensor and said microwave sensor are communicatively connected to said processor, said processor generating a control signal based on the detection of the presence or absence of a human body by said infrared sensor and said microwave sensor.

10. The presence detection apparatus according to claim 9, wherein the infrared sensor is powered on and then operates continuously, and the microwave sensor is powered/activated under control of the processor, wherein the processor is configured to control at least one activation/wake-up of the microwave sensor based on the powering/activation of the microwave sensor after a yes transition to no transition based on the detection result of the infrared sensor on the presence or absence of the human body.

11. The presence detection device as claimed in claim 10, wherein the presence detection device comprises a communication module, wherein the communication module is communicatively connected to the processor for transmitting the control signal.

12. The presence detection apparatus of claim 11, wherein the communication module wirelessly transmits the control signal.

13. The presence detection apparatus as claimed in claim 12, wherein said processor is configured as a chip in an integrated circuit.

14. The presence detection apparatus of claim 13, wherein the microwave sensor is packaged with the chip.

15. The presence detection device according to claim 9, wherein the presence detection device comprises a charging interface, the first battery and the second battery being electrically connected to the charging interface for being charged via the charging interface.

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